*
{
	padding:0;
	margin:0;
}

body
{
	background-color: white;
	font-family: "Trebuchet MS",arial;
	padding: 100px;
}

#calculadora
{
	background-color: rgb(249,249,249);
	border-collapse: collapse;
	margin: 0 auto;
	width: 30%;
}

#calculadora td
{
	vertical-align: middle;
}

#resultado
{
	text-align: right;
	width: 90%;
}

.botones
{
	background-color:white;
	border:solid 1px #646464;
	height: 40px;
	width: 80%;
}